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International journal of geographical information systems Volume 3, 1989 - Issue 4
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Original Articles

A comparison of techniques for calculating gradient and aspect from a gridded digital elevation model

ANDREW K. SKIDMORE Department of Forestry, Australian National University, G.P.O. Box 4, Canberra, Australian Capital Territory, 2601, AustraliaView further author information
Pages 323-334 | Published online: 27 Apr 2007
 
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Abstract

Digital elevation data spaced on a regular 30 m grid were generated over a region of moderate topography in south-east Australia. Six algorithms for calculating gradient and aspect from these data were compared. General linear regression models and the third-order finite difference methods were the most accurate.

Additional information

Notes on contributors

ANDREW K. SKIDMORE

Present address: Forestry Commission of N.S.W., G.P.O. Box 2667, Sydney, New South Wales 2000, Australia.

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